单词	Group B
释义	Group B noun : any of various strains of a streptococcus (Streptococcus agalactiae) that include the causative agents of certain infections (such as pneumonia and meningitis) especially of newborn infants —usually used attributively Group B streptococcal infections Word History First Known Use 1965, in the meaning defined above Medical Definition Group B noun -ˈbē  : the Lancefield group of usually beta-hemolytic streptococci that comprises all strains of a species of the genus Streptococcus (S. agalactiae) and that includes the causative agents of certain infections (as septicemia, pneumonia, and meningitis) especially of newborn infants —usually used attributively affected with Group B strep compare group a
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